<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<title>state</title>
</head>

<body>
	<!-- 准备好一个“容器” -->
	<div id="test"></div>

	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>

	<script type="text/babel">

		class Weather extends React.Component {

			// 1.初始化状态
			state = { isHot: true, wind: '微风' }

			render() {
				console.log(this);
				const { isHot } = this.state
				return <h2 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'}</h2>
			}

			//2.自定义方法要用赋值语句形式+箭头函数
			changeWeather = () => {// 箭头函数没有this,如果使用this则找外层的this
				const isHot = this.state.isHot;
				this.setState({ isHot: !isHot })
			}
		}

		ReactDOM.render(<Weather />, document.getElementById('test'))
	</script>
</body>

</html>